<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div{
            width: 200px;
            height: 200px;
            background-color: #900;
        }
        p{
            color:#600
        }
        span{
            font-size: 40px;
            color:#200
        }

    </style>
</head>
<body>
    <div>div标签</div>
    <hr>
    <p>这是段落</p>
    <span>span标签</span>
</body>
</html>